01 - In a large pitcher, combine cold water, lemon juice, and maple syrup. Stir thoroughly until syrup is completely dissolved.
02 - In a small bowl, whisk blue spirulina powder with room temperature water until fully dissolved and smooth.
03 - Pour spirulina mixture into the lemonade base and stir until evenly colored throughout.
04 - Taste and adjust sweetness or lemon juice as desired to achieve preferred balance.
05 - Add ice cubes, lemon slices, and fresh mint leaves to pitcher or serving glasses. Serve immediately while chilled.